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Cryptomatte is a method developed by Psyop for efficiently encoding accurate mattes. It typically uses typically three to five render elements (which are automatically generated ) with OpenEXR files, render channels stored in a multichannel OpenEXR file which removes the hassle of creating dozens , or hundreds , of Multi MattesMultimattes. Using the Cryptomatte plugin for NUKE or Fusion, mattes can be extracted through directly picking objects or entering object names. Note that single-channel EXR files using DWA compression are supported, in addition to multichannel EXR files.

Compared to the Multi Matte Render Element, Cryptomatte does not require any additional setup to the scene, like specifying object IDs, material IDs, etc

 

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 Currently, the Cryptomatte Render Element requires the Bucket Image Sampler type.

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